Well, kind of yes. But the 3d accelerators can be used for 2d stuff just as well. (As probably some remember from PC's ten or so years ago, at the age of Matrox 2d accelerated vs. 3DFX display cards.)

You can use 3d for instance to do overlay and zooming in and and out and things like that. Kind of like locking the viewpoint on the Z axis and looking downwards towards the application surface.

It's a very limited use of what is possible in theory, but using it only in a limited fashion make it any worse. Just that hardware is advertised as being 3d accelerated naturally shouldn't rule out good taste in using the capabilities that it offers.